Lock-alarm.



' J. NEWMAN.

LOCK ALARM.

APPLICATION FILED AUG. 26, 1908.

922 ,6 1 6, Patented May 25, 1909.

- 46 11 m/ ENTOH WITNESSES z 7 [/3 3,3 47 7Z W UNTTE r%T.e1.TE% PATENT JOSEPH NEWMAN, OF NEW YORK, N. Y.

LOCK-ALARM.

T 0 all whom it may concern:

Be it known that I, Josnrn NEWMAN, a subject of the German Emperor, and resident of the city of New York, in the county of Kings and State of New York, have invented certain new and useful Improvements in Lock-Alarms, of which the following is a specification.

The present invention relates to alarms, and more particularly to lock alarms, adapted to be attached to a door or look of any suitable construction.

The object of the invention is to provide a simple apparatus of the character specified, which may be attached to the door in such a manner that the key or any other instrument cannot be inserted into the look without causing an alarm bell to ring.

A further object of the invention is to provide means sounding the alarm bell when the door knobs are turned in order toopen the door.

A still further object of the invention is to provide means in operative connection with the clapper within said bell, whereby the bell may be actuated from outside at will, to indicate that a person wishes to gain access to the room or building, to the door of which the lock alarm is attached.

A still further object of the invention is to simplify, and on the other hand, improve the construction of the lock alarms and to render their operation more eflicient and convenient.

Other objects will be apparent from a reading of the specification and an examination of the drawings, forming part of the present application for Letters Patent.

To attain the objects, hereinbefore described, the invention consists, generally speaking, of a bell of any suitable construction, the clapper of which is operatively con nected by suitable intermediate means with a push-rod projecting into the lock to prevent the insertion of a key beyond a predetermined point, and which clapper is, on

the other hand, in connection with means 1 carried by the spindle of the door knob, the rotation of which operates said clapper. Means are furthermore provided which are adapted to operate the clapper at will from the outside. The combination and arrangement of these parts and the novel features of the same will be hereinafter fully described and pointed out in the claims.

Specification of Letters Patent.

Application filed August 26, 1908.

Patented May 25, ieoe.

Serial No. 450,347.

The invention is illustrated in the accompanying drawings, in which- Figure 1 is a side elevation, partly in section, of the improved apparatus, attached to a door, Fig. 2 a front elevation, partly in section, of the alarm, Fig. 3 a detail construction of the bell, and Fig. 4 a detail of the construction of the push rod.

In the accompanying drawings, 1 designates the door, which, as shown, is of the usual construction and is provided with escutcheon plates 2 and 3, and a mortise lock 4. The key-holes of the escutcheon plates are indicated at 5 and 6 and those of the lock at 7 and 8.

The numerals 9 and 10 designate the door knobs, and 11 the spindle thereof.

The alarm is arranged on a support 12, in this case a closed casing, provided with a detachable bottom 13, so that access may be had to the operating parts arranged within the same. This casing is secured to the inner side of the door at a proper distance below the key-hole, and carries a bell 1 1, preferably attached. to the outer side of this casing upon a. bracket 15, secured thereto. The clapper of the bell is shown at 16 and consists of a spindle 17, journaled in the casing 12 and a bracket 12, carried thereby, and the balls 18, secured to the spindle 17 by means of springs 19. The clapper hits against a projection 20 of the bell and sounds thus the same.

1t is obvious that a bell of any suitable construction may be used in connection with the apparatus to be described, it being immaterial Whether the spindle 17 of the clapper rotates or oscillates.

The spindle 17 is rotated by a rack 21 by intermediary means, hereinafter to be described. The rack 21 is slidably arranged in the casing 12 and is guided in its reciprocating movement by the casing at 2 and a tubular member 23, arranged in a hole 24 of the door 1. This rack meshes with a pinion 25, arranged on a shaft 2 6, ournaled in the casing 12, and carrying a gear 27 in mesh with a pinion 28 on the spindle 17 of the clapper. Obviously in alternating the rack 21, the spindle 17 is rotated and sounds thus the bell.

A push rod 29 is attached. to the rack 21. This push rod is inserted. into the key-holes 5 and 7 of the escutcheon plate 3 and the lock 1, respectively, and extends into the look far enough to revent the insertion of a key to withdraw t e lockbolt from its socket. The push rod is kept in this position preterably by means of a siring 30, one end of which engages the pus 1 rod, while the other end is fastened to some stationary part of the casing orto' the door itself. As shown in the drawings, the push rod. is adapted to slide in a slot 31 of the casing 12, and carries a plate 82, normally covering this slot.

An upwardly extending projection 33 of the push rod 29 engages a cam plate 34, having a hub 35, fitting the spindle 11 of the door knobs, and held thereon against rotation by any suitable means, such as, for instance, a screw 36, projecting through a hole of the hub and engaging the spindle 11. The cam plate 34 comprises. a segmental cam 37, the face of which tapers from the uppermost portions 38 and 3.9 of the same toward its lowermost point 40, which normally engages with the projection ot' the push rod 29. The push rod 29 is preferably made of two sections 41 and 42", pivoted together at 43 and held in the normal position, shown in Fig. 1, by means of a sleeve 44. Obviously when the sleeve 44 is pushed downward and the push rod disengaged with the key-hole, the section 41 may be placed in a substantially horizontal plane, whereby the free end of the push rod 29 will engage a hole 45 in the door. The object of this arrangement will be hereinafter more fully described.

As hereinbefore mentioned, one end of the rack 21 is guided by a tubular member 23', arranged in a hole 24 of the door 1. This tubular member carries a projection 46 on its outer end, which projects through the door. The outward movement of the tubular member 23 is limited by a flange 47, arranged on the inner end thereof, while the inward movement is limited by a yoke 48, against which and the flange 47 bears a spring 49, in order to keep the tubular member with its projection 46 in its normal osition.

The operation of to device is as follows: The push rod 29- is kept normally by means of the spring 30 in the lock, to prevent the insertion of a key. Obviously in inserting the key far enough to allow of an engagement of the same with the locking bolt, the push rod 29 is pushed back, whereby the rack 21, secured thereto, rotates the pinion 25, operating the clapper of the bell in a manner hereinbefore described.

It will be easily seen that the occupant of a room may leave his room ,door unlocked with the alarm attached thereto, for the reason that in turning the knob 10, the cam late 34 is oscillated, whereby one of its cam taces, depending upon the direction in which the knob rotates, will push the push-rod 29 backward by reason of the engagement of the cam plate with the projection 33 of the same. In this way the bell is sounded, notifying the occupant of the room that aperson is about to open the door.

In order to: allow of an insertion of the key from inside, the push rod 29 is disengaged with the lock, and then. the sleeve 44 pushed downward, whereby the section 41 of the push rod may be brought in a substantially horizontal plane, whereby its free end will enter the hole 45 in the door, and the rack 21 be brought back into its normal position.

Should a person, having no key wish to enter the room, the same may call the attention of the occupant of the room by means of the cylindrical member 23 with its projection 46, which may be termed a push button. In pressing the push button, the rack 21 is forced inwardly to ring the bell 14. It will be seen that the bell may be sounded by means of the push button when the push rod 29 engages the key-hole, or when engaging the hole 45 in the door.

It is apparent that the purpose of the device is threefold, first, to sound the bell when a key is inserted into the keyhole of the lock, second, when the door knob is turned and, third, when a person wishes to gain access to the room.

It will be noticed that many minor changes may be made in the construction and arrangement of the several parts of the apparatus without departing from the spirit and scope of the present invention.

What I claim is:

1.. In a lock alarm, the combination with a lock, of an alarm bell, a gearing to ring said bell, operating means in engagement with said. gearing and extending into the key-hole of said lock, whereby said gearing is actuated by the insertion of a key into said lock,

and means carried by the door-knob spindle i and engaging said operating means substantially as and for the purpose specified.

2. In a lock alarm, the combination with a lock, of an alarm bell, a gearing to ring said bell, a push-rod engaging said gearing and extending into the key-hole of said lock, whereby said gearing is actuated by the insertion of a key into said lock, and means carried by the door-knob spindle and engaging said push-rod substantially as and for the purpose specified.

31. In a lock alarm, the combination with a lock, of an alarm bell, a gearing to ring said bell, a push-r0 d engaging said gearing and extending into the key-hole of said lock, whereby said gearing is actuated by the insertion of a key into said lock, and a cam plate carried by the door-knob spindle and engaging said push-rod substantially as and for the purpose specified.

4. In a lock alarm, the combination with a look, of an alarm bell, a rack and pinion arrangement to ring said bell, operating means secured to said rack and extending into the keyhole of said lock, whereby said rack is .1"

actuated by the insertion of a key into said lock, and means carried by the door-knob spindle and engaging said operating means substantially as and for the purpose speci- 5. In a lock alarm, the combination with a lock, of an alarm bell, a rack and pinion arrangement to ring said bell, a push-rod secured to said rack and extending into the key-hole of said lock, whereby said rack is actuated by the insertion of a key into said lock, and means carried by the door-knob spindle and engaging said push-rod substantially as and for the purpose specified.

6. In a lock alarm, the combination with a lock, of an alarm bell, a rack and pinion ar rangement to ring said bell, operating means secured to said rack and extending into the key-hole of said lock, whereby said rack is actuated by the insertion of a key into said lock, and a cam plate carried by the doorknob spindle and engaging said operating means substantially as and for the purpose specified.

7. In a lock alarm, the combination with a lock, of an alarm bell, a rack and pinion arrangement to ring said bell, a push-rod secured to said rack and extending into the key-hole of said lock, whereby said rack is actuated by the insertion of a key into said lock, and a cam plate carried by the door knob spindle and engaging said push-rod sublstantially as and for the purpose specifier 8. In a lock alarm, the combination with a lock, of an alarm bell, a rack and pinion arrangement to ring said bell, a push-rod se cured to said rack and extending into the keyhole of said lock, whereby said rack is actuated by the insertion of a key into said look, a projection on said push-rod, and a cam plate carried by the door-knob spindle and engaging said projection to sound said bell as the door knobs are turned in either direc- 3 tion.

9. In a lock alarm, the combination with a lock, of an alarm bell, a rack and pinion ar rangement to ring said bell, a push-rod secured to said rack and extending into the key-hole of said lock, whereby said rack is actuated by the insertion of a key into said lock, a projection on said push-rod, and means carried by the door-knob spindle and engaging said projection to sound said bell as the door-knobs are turned in either direction.

10. In a lock alarm, the combination with a lock, of an alarm bell, a rack and pinion arrangement to ring said bell, a push-rod sec ured to said rack and extending into the keyhole of said lock, whereby said rack is actuated by the insertion of a key into said look, a projection on said push-rod, a cam plate carried by the door-knob spindle and engaging said projection to sound said bell as the doorknobs are turned in either direction, and a push button adapted to actuate said bell at will.

11. In a lock alarm, the combination with a lock, of an alarm bell, a rack and pinion arrangement to ring said bell, a push-rod secured to said rack and extending into the key-hole of said lock, whereby said rack is actuated by the insertion of a key into said look, a projection on said push-rod, means carried by the door-knob spindle and engaging said projection to sound said bell as the door-knobs are turned in either direction, and a push-button adapted. to actuate said bell at will.

12. In a lock alarm, the combination with a lock, of an alarm bell, a gearing to ring said bell, operating means engaging said gearing and extending into the key-hole of said lock, whereby said gearing is actuated by the insertion of a key into said lock, and means carried by the door-knob spindle independent of and engaging said operating means substantially as and for the purpose specified.-

18. In a lock alarm, the combination with a lock, of an alarm bell, a gearing to ring said bell, a push-rod engaging said gearing and extending into the keyhole of said lock, whereby said gearing is actuated by the in sertion of a key into said lock, and means carried by the door-knob spindle independent of and engaging said push-rod substantially as and for the purpose specified.

14. In a lock alarm, the combination with a lock, of an alarm bell, a gearing to ring said bell, a push-rod engaging said gearing and extending into the keyhole of said lock,

whereby said gearing is actuated by the insertion of a key into said lock, and a cam plate carried by the door-knob spindle independent of and engaging said push-rod substantially as and for the purpose specified.

15. In a lock alarm, the combination with a lock, of an alarm bell, a rack and pinion arrangement to ring said bell, operating means secured to said rack and extending into the key-hole of said lock, whereby said rack is actuated by the insertion of a key into said lock, and means carried by the door-knob spindle independent of and engaging said operating means substantially as and for the purpose specified.

16. In a lock alarm, the combination with a lock, of an'alarm bell, a rack and pinion arrangement to ring said bell, a push-rod secured to said rack and extending into the key-hole of said lock, whereby said rack is actuated by the insertion of a key into said lock, and means carried by the door-knob spindle independent of and engaging said &

means secured to said rack and extending into the key-hole of said lock, whereby said rack is actuated by the insertion of a key into said look, a cam plate carried by the door-knob spindle independent of and ena lock, of an alarm bell, a rack and pinion arrangement to ring said bell, a push-rod secured to said rack and extending lnto the keyhole of sald lock, whereby said rack is actuated by the insertion of a key into said -lock, a projection on said push-rod, and a cam plate carried by the door-knob spindle independent of and engaging said projection to sound said bell as the door-knobs are turned in either direction.

20. In a lock alarm, the combination with a lock, of an alarm bell, a rack and pinion arrangement to ring said bell a push-rod secured to said rack and extending into the key-hole of said lock, whereby said rack is actuated by the insertion of a key into said lock, a projection on said push-rod, and

means carried by the door-knob spindle independent of and engaging said roj'ec-tion to sound said bell as the do0rmobs are turned in either direction.

21. In a lock alarm, the combination with a lock, of an alarm bell, a rack and pinion arrangement to ring said bell, a push-rod secured to said rack and extending into the key-hole 01' said lock, whereby said rack is actuated by the insertion of a key into said lock, a projection on said push-rod, a cam plate carried by the door-knob spindle independent of andengaging said projection to sound said bell as the door-knobs are turned in either direction, and a push button adapted to actuate said bell at will.

22. In a lock alarm, the combination with a lock, of an alarm bell, a rack and pinion arrangement to ring said bell, a pushuod secured to said rack and extending into the key-hole of said lock, whereby saidv rack is actuated by the insertion of a key into said look, a rojection on said push-rod, means carried by the door-knob spindle independ ent of and engaging said projection to sound said bell as the door-knobs are turned in either direction, and a push button adapted to actuate said bell at will.

Signed. at New York, in the county of New York, and State of New York this 22nd day of August, A. D. 1908.

JOSEPH NEWMAN.

Witnesses:

SIGMUND HERZoG, S. BIRNBAUM. 

